Separable binding post



Jan. 7, 1930. H. T. ADAMS SEPARABLE BINDING POST Filed July 1928Patented Jan. 7, 1930 UNITED STATES HENRY 'I. ADAMS, OF CHICAGO,ILLINOIS SEPARABLE BINDING rosr Application filed Jui 9,

This invention relates to securing means and, particularly, to that typeof binding post employed in binders.

One of the primary objects of the invention is to provide a binding postof simple and cheap construction which will serve to secure papers inpermanent binders, and which embodies means enabling the post to resisttensional strain and yet to be disengaged from the binder, when desired,in order that it may be used again in the'same or another binder.

The invention is described in the following specification and shown inthe accompanying drawing, in which Figure 1 is a view in elevation of apermanent binder showing posts, embodying my invention, attachedthereto, the opposite ends of the posts being shown; Fig. 2, a sectionalview, the section being taken as indicated by line 2 of Fig. 1; Fig. 3,a vertical view of the inner member, showing a notched or beveled sideat one end; Fig. 4:, a view in elevation of a locking member having a.25 notched or beveled side complementary to that of the inner membershown in Fig. 3;

and Fig. 5, a view in elevation of the outer' or tubular member.

In the illustration given, 1 represents the outer or tubular memberwhich is provided at 1ts upper end with a flange 2. The numeral 3represents the inner member which is also provided at one end with aflange or head 4. The inner member 3 at the end opposite the flange 4 isnotched to provide an inclined or beveled side 5. A locking member 6,which is preferably of the same diameter as the inner member 3 and,ineffect, may be a segment of the inner member 3, is also provided with aninclined or beveled side 7 which is complementary to the beveled side 5of-the inner member 3. g

The angle of inclination of the sides 5 and 7 is preferably such that aslight pull upon r the inner member 3 will cause the members 3 and 6 tobe pressed outwardly against the inner walls of the tubular member 1, asillustrated in Fig. 2.

' In the operation of the device, the outer or tubular member 1 isinserted through a per- 1928. Serial No. 291,426.

foration in the cover and paper. The member 6 is then placed upon theinner member 3 in such a way as to bring the complementary inclinedsides 5 and 7 into contact. The inner member 3 and locking member 6, asthus assembled, are inserted through a perforation 1n the opposite coverand within the tubular member 1. The telescoping members 1 and 3 arethen pressed together until the post is of the desired length. Thepressure then exerted by the covers upon the flanged heads 2 and 4: ofthe telescoping members 1 and3 will cause the members 3 and 6 to move inopposite directions, as aresult of which the beveled sides will forcemembers 3 and 6 against the inner walls of the tubular member 1 and thuswill prevent the members 1 and 3 from being drawn further apart. It willbe seen that the means illustrated permit the telescoping post membersto be contracted but prevent their expansion by tensional force.

When it is desired to remove the binding post from the binder or toexpand the telescoping members 1 and 3,21 small rod may be insertedthrough the opening at the flanged end of the tubular member, and bythis means the segment or looking member 6 may be pushed against theinner member- 3 and the two members forced to any point along thetubular member 1 or maybe wholly removed therefrom. It will be observedthat in this operation there is no expansion of the members 3 and 6 atthe point where the sliding sides 5 and 7 contact.

The foregoing detailed description has been given for clearness ofunderstanding only and no unnecessary limitations should be understoodtherefrom, but the appended claims should be construed as broadly aspermissible,'in view of the prior art.

- WhatI regard as new, and desire to secure by Letters Patent, is:

1. In a'device of the character set forth, a binding post comprising aninner member having segments provided with complementary inclined sidesand an outer member having a substantially smooth inner bore adapted toreceive said inner member, said segments tending to expand against thewalls of said outer member when tensional force is applied at either endof said binding post.

2. In a device of the character set forth, inner and outer telescopingmembers, said outer member having a substantially smooth inner bore andsaid inner member comprising segments having complementary beveled sideswhich cause the segments to expand against the walls of the outermemberand prevent the telescoping members from yielding to tensional strain.

3. In a device of the character set forth, a binding post comprising atubular member provided with a head, and an inner member adapted toreciprocate in said tubular member, said inner member being provided atone end with a head and at the other end with a notch, and a lockingmember formed with a notch complementary to the notch of the innermember and in engagement therewith. 4. A binding post comprising aninner member equipped at one end with a flange and having segmentsprovided with complementary inclined sides and a tubular member equippedat one end with a flange and adaptedto receive said inner member, saidtubular member having a substantially smooth bore and said segmentstending to expand against the walls of said tubular member whentensional force is applied at either end of said binding post. I

5. Ina device of the character set forth, a pair of telescoping members,the inner one of which comprises post segments provided withcomplementary inclined sides which expand on being pulled outwardlybutcollapse to permit removal of said inner post when pressure isapplied to the outer end of one of said post segments.

HENRY T. ADAMS.

